Reload (refresh) page within an if statement

[T. Wintershoven]

Hi all,

Is there a simple way in php to reload a page coded within an if
statement.(see code below)
It's very important that the session stays intact.
The filename is RCStudent.php

*************** * A peace of code*********** *************** *
<?php
session_start() ;
?>

if($_POST['ST']!='')
{
$_SESSION['nScreen']=2'';
}
elseif ($_POST['AT']!='')
{
$_SESSION['nScreen']=0'';

*** RELOAD CODE HERE ***
}

*************** **** End code*********** *************** *****

T.i.a.

Regards,

Tino Wintershoven.
The Netherlands.

[Shelly]

"T. Wintershoven" <tw***********@ casema.nlwrote in message
news:ra******** *************** *******@casema. nl...

Hi all,

Is there a simple way in php to reload a page coded within an if
statement.(see code below)
It's very important that the session stays intact.
The filename is RCStudent.php

*************** * A peace of code*********** *************** *
<?php
session_start() ;
?>

if($_POST['ST']!='')
{
$_SESSION['nScreen']=2'';
}
elseif ($_POST['AT']!='')
{
$_SESSION['nScreen']=0'';

*** RELOAD CODE HERE ***
}

*************** **** End code*********** *************** *****

Do a header("Locatio n: this_page_with_ appropiate_para meter_passing") ; ?

Shelly

[T. Wintershoven]

Hi Shelly,

Thanks for your reaction.

When i do a header(location ), i get an error message:
Warning: Cannot modify header information - headers already sent.

The header is allready sent on the second line ... session_start() ... (see
code)

Tino

"Shelly" <sh************ @asap-consult.comwrot e in message
news:9A******** ********@newsre ad4.news.pas.ea rthlink.net...

"T. Wintershoven" <tw***********@ casema.nlwrote in message
news:ra******** *************** *******@casema. nl...

Hi all,

Is there a simple way in php to reload a page coded within an if
statement.(see code below)
It's very important that the session stays intact.
The filename is RCStudent.php

*************** * A peace of code*********** *************** *
<?php
session_start() ;
?>

if($_POST['ST']!='')
{
$_SESSION['nScreen']=2'';
}
elseif ($_POST['AT']!='')
{
$_SESSION['nScreen']=0'';

*** RELOAD CODE HERE ***
}

*************** **** End code*********** *************** *****

Do a header("Locatio n: this_page_with_ appropiate_para meter_passing") ; ?

Shelly

[Ric]

Not sure exactly what kind of "reload" you are talking about?
I assume you mean the client's browser should reload at specific times:

PHP can't reload a site, the browser does a reload if instructed to,
therefore you need to tell the client's browser to reload the page, just
add:

<META HTTP-EQUIV=REFRESH CONTENT="10; URL=RCStudent.p hp">

to your html head. Here the page is reloaded every 10 seconds

PHP can redirect with header location like someone else just mentioned.
And a redirect works only if you haven't echoed any html before doing a:

header("Locatio n: ....);
T. Wintershoven schrieb:

Hi all,

Is there a simple way in php to reload a page coded within an if
statement.(see code below)
It's very important that the session stays intact.
The filename is RCStudent.php

*************** * A peace of code*********** *************** *
<?php
session_start() ;
?>

if($_POST['ST']!='')
{
$_SESSION['nScreen']=2'';
}
elseif ($_POST['AT']!='')
{
$_SESSION['nScreen']=0'';

*** RELOAD CODE HERE ***
}

*************** **** End code*********** *************** *****

T.i.a.

Regards,

Tino Wintershoven.
The Netherlands.

[Christoph Burschka]

You can't send a Location header after sending cookies (which
session_start() does).

So you either need to find a way to reload without starting a session,
or you need to print a <metarefresh tag into the page to reload it...
T. Wintershoven schrieb:

Hi Shelly,

Thanks for your reaction.

When i do a header(location ), i get an error message:
Warning: Cannot modify header information - headers already sent.

The header is allready sent on the second line ... session_start() ... (see
code)

Tino

"Shelly" <sh************ @asap-consult.comwrot e in message
news:9A******** ********@newsre ad4.news.pas.ea rthlink.net...

>>"T. Wintershoven" <tw***********@ casema.nlwrote in message
news:ra****** *************** *********@casem a.nl...

>>>Hi all,

Is there a simple way in php to reload a page coded within an if
statement.(s ee code below)
It's very important that the session stays intact.
The filename is RCStudent.php

************ **** A peace of code*********** *************** *
<?php
session_start() ;
?>

if($_POST['ST']!='')
{
$_SESSION['nScreen']=2'';
}
elseif ($_POST['AT']!='')
{
$_SESSION['nScreen']=0'';

*** RELOAD CODE HERE ***
}

************ ******* End code*********** *************** *****

Do a header("Locatio n: this_page_with_ appropiate_para meter_passing") ; ?

Shelly

--
CB

[Erwin Moller]

Christoph Burschka wrote:

You can't send a Location header after sending cookies (which
session_start() does).

So you either need to find a way to reload without starting a session,
or you need to print a <metarefresh tag into the page to reload it...

Or you buffer the output by calling ob_start() at the start of the script.
:-)

Regards,
Erwin Moller

>

T. Wintershoven schrieb:

>Hi Shelly,

Thanks for your reaction.

When i do a header(location ), i get an error message:
Warning: Cannot modify header information - headers already sent.

The header is allready sent on the second line ... session_start() ...
(see code)

Tino

"Shelly" <sh************ @asap-consult.comwrot e in message
news:9A******* *********@newsr ead4.news.pas.e arthlink.net...

>>>"T. Wintershoven" <tw***********@ casema.nlwrote in message
news:ra***** *************** **********@case ma.nl...

Hi all,

Is there a simple way in php to reload a page coded within an if
statement.( see code below)
It's very important that the session stays intact.
The filename is RCStudent.php

*********** ***** A peace of code*********** *************** *
<?php
session_start() ;
?>

if($_POST['ST']!='')
{
$_SESSION['nScreen']=2'';
}
elseif ($_POST['AT']!='')
{
$_SESSION['nScreen']=0'';

*** RELOAD CODE HERE ***
}

*********** ******** End code*********** *************** *****

Do a header("Locatio n: this_page_with_ appropiate_para meter_passing") ; ?

Shelly

--
CB

[ED]

"Christoph Burschka" <ch************ ****@rwth-aachen.dewrote in message
news:4t******** *****@mid.dfnci s.de...

You can't send a Location header after sending cookies (which
session_start() does).

So you either need to find a way to reload without starting a session, or
you need to print a <metarefresh tag into the page to reload it...

Um, you sure about that?
The code below works fine here:

<?php
session_start() ;

if (! isset($_GET['refresh'])) {
setcookie('foo' ,'Bar');
$_SESSION['foo'] = 'Bar';
header('Locatio n:'.$_SERVER['PHP_SELF'].'?refresh=1');
} else {
echo 'page refreshed';
echo '<br />Session foo: '.$_SESSION['foo'];
echo '<br />Cookie foo: '.$_COOKIE['foo'];
}
?>

maybe the OP is outputting something (whitespace etc) prior to the
redirection?

cheers
ED

[Christoph Burschka]

ED wrote:

"Christoph Burschka" <ch************ ****@rwth-aachen.dewrote in message
news:4t******** *****@mid.dfnci s.de...

>You can't send a Location header after sending cookies (which
session_start( ) does).

So you either need to find a way to reload without starting a session, or
you need to print a <metarefresh tag into the page to reload it...

Um, you sure about that?
The code below works fine here:

[...]

>

Then I remember it wrong...

Oh, right: What you can't send after a cookie is the HTTP response code - such
as "HTTP/1.1 303 See Other". The status code apparently has to be the first
header sent, while the Location header can follow after the cookies just fine.

I've never used a Location header without explicitly setting a 3xx response yet,
so that's the reason for the mix-up.

--
Christoph Burschka

[Buddy]

You most definitely cannot use Header once you have output something to
the screen. I have had to battle that one a few times. It all depends
on where the php code is put in your page. If it has to be after
something is output (<bodytag) why not use JavaScript? If before
<bodyuse <meta>.

Christoph Burschka wrote:

ED wrote:

"Christoph Burschka" <ch************ ****@rwth-aachen.dewrote in message
news:4t******** *****@mid.dfnci s.de...

You can't send a Location header after sending cookies (which
session_start() does).

So you either need to find a way to reload without starting a session, or
you need to print a <metarefresh tag into the page to reload it...

Um, you sure about that?
The code below works fine here:

[...]

Then I remember it wrong...

Oh, right: What you can't send after a cookie is the HTTP response code - such
as "HTTP/1.1 303 See Other". The status code apparently has to be the first
header sent, while the Location header can follow after the cookies just fine.

I've never used a Location header without explicitly setting a 3xx response yet,
so that's the reason for the mix-up.

--
Christoph Burschka